libglib2: fix g_print()

If GLib is cross-compiled, the default printf settings that it selects are wrong
for glibc. This leads to issues with the g_print() functions, e.g. "Aborted"
errors returned by gst-inspect.

This patch fixes this issue by setting printf configuration options compatible
with glibc. These options should also be compatible with uClibc.

This solution has been suggested for LTIB by Rogerio Nunes:
https://community.freescale.com/thread/302734



Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>